Concrete mold



narran stares CLIFFORD A.. BARR, 0F LINCOLN, NEBRASKA.

CONCRETE MOLD` application fue@ @meer 9,1920, rsei-iai NQ.

To all /w/lom t may concern.'

Be it known that l, CLIFFORD A. BARR, a citizen of the United States, residing at Lincoln, in the county of o Lancaster and State of Nebraska, have invented a new and useful Concrete Mold, of which the following is a specilication.

ffy invention relates generally to improvements in knock-down, adjustable molds for concrete work, and it is particularly designed for use in the construction of concrete beams. a

At the present time, in the construction of concrete work, molds are set up or con` structed on the ground as the occasion arises, and after the concrete has set the material used in constructing the molds is usually so broken and full of nails that it is scrapped or thrown away with aconsequent increase in over-head expense. The principal reason why ready made molds have not been generally used in concrete construction is bec ausenone have so far been found to Abe sufficiently adaptable todiferent kinds of work, nor sui'liciently inexpensive and transportable toY warrant the initial outlay in moneynecessary to provide them as a part ofthe permanent establishment of a contractor. Furthermore, thev body portion of a commercially successful and practical concrete mold must need be renewable and readily repairable as the hard usageto which it is put quickly deteriorates the material of which it is constructed. Consequently the fundamental details of any practical con` crete mold must necessarily be the parts which hold the body together, and these must function in a manner similar to a clamp or frame for the members forming the body of the mold.

With the foregoing in view, I have provided a concrete mold, the body of which may be readily renewed or repaired, and the frame or clamping parts of which may be readily dismounted from the body. Furthermore,` I have provided a'mold frame which is adjustable both vertically and laterally,

and which combines the necessary features of durability, strength and inexpensiveness.

Furthermore, the frame of the mold may be used to hold timbers together when it is desired to construct a mold on the ground of miscellaneous stock, and this without the use of many nails or the like which generally necessitatescrapping the timber of which Specicatidn of Letters Patent.

Patented Feb. 28,` 192,2.

such a mold is constructed after thev concrete has set.

Tov these and other ends, my invention consists in the construction, arran ement and combination of parts described creinafter and pointed outin the claims forming ay part, of this specification. Y, l

One embodiment of my invention is rep,- resented by way of example inthe accompanying drawings, wherein;`

F1 re l is a asseiizilblled.7

Figure 2, is an end view of the mold.

Figure 3, is a perspective view of one of the bottom supports forming a part of the frame, and, Y

Figure l, is a view ports. p

Like characters of reference refer to like or similar of the drawings, in which perspective view of the mold A designates the bottom of my mold body and B the sides thereof, which are arranged the sol that their lower edges lie flush with c under face of the bottom.

isposed at intervals upon the lower face of the bottom A and extending transversely thereacross are a plurality of supporting bars l which are preferably constructed of flattened material. such as steel or iron and which have openings 2 formed therein through whichvnails 3 are driven to attach the same to the bottom. Furthermore, the ends of the supporting bars extend a considerablej distance outwardly from the sides B of the body and l have longitudinally spaced, aligned openings 4 formed therein through which the lower terminal ends of side supports or bars 5 are inserted when the mold is set up. i

The side supportin bars 5 are designed to extend vertically rom the bottom supporting bars l and each has formed in its upper end an opening 6 through which a nail 7 is driven when the mold is assembled to hold the sides in position. It is here pointed out that both the side and bottom supporting bars may be formed of square or T iron, or of `any other conguration, should the occasion therefor arise.

As the pressure of concrete mixture is exerted laterally as well as downwardly with respect to the receptacle wherein it is confined, there are provided a plurality of twisted wires 8 extending transversely across of one of the side sup-v parts throughout the several views los the body of the mold between the side supporting bars 5. The parent loops of these wires are situated intermediate-their lengths so that certain minor adjustments may be effected by increasing the number of convclutions of the strands thereof when more minute alignment of the sides B is required. As shown, the ends of the wires extend through small openings in the sides and are twisted about the side supporting bars. iVhen the concrete mixture confined in the mold has become set the wires are clipped and the nails 7 withdrawn whereupon the mold can be dismounted with facility. ln the drawings there areV shown a pair of transverse supporting beams arranged between the sides oi the body, but these are conventional and do not form a part of the mold construction in practice.

vIn setting up the mold, the bottom supports are nailed in position and the sides B are arranged as shown in Figure l, Whereupon the lower terminal ends of the side supporting bars are inserted in the proper holes 4L and the upper ends thereoi1 are nailed to the sides to hold the mold in its entirety assembled. The wires 8 are then strung and twisted after which the concrete mix-v ture may be poured into the mold.

While no end pieces or a top piece is described in connection with my mold'k the ne cessity may arise for using them as in the case of forming square blocks. lnv the event a top and endsare required it is my intention to use the conventional `type which forms no part oi the present invention. it is here particularly pointed out that the Side supporting bars 5 are both laterally and vertically adjustable with respect 'to the bottom supporting bars l, so that a variety of sizes of bodies may be used in conjunction with the trame herein described. Furthermore, attention is called to the fact that a mold otl this character is easily transported and may be fixed in positions which with the usual molds'are qui-te inaccessible, such as in forming ceiling abutments and eX- iended beam ends.

llhile in the foregoing, there has been illustrated and described such combination and arrangement of elements as constitute the preferred embodiment of my invention, it is nevertheless desired to emphasize the i'act that interpretation of the invention should only be conclusive when made in the iight of the subjoined claims.

Having described my invention and its objects with such attention to detail as will thoroughly acquaint one skilled in the art with its construction and advantages, I claim l. A mold for concrete comprising a co1- lapsible body, detachable bottom supports for the body provided with o nings, detachable side `supports for the Eddy receivable through said openings, and said side supports being vertically movable through said openings to accommodate mold bodies of diii'erent heights.

2. A device 01"' the character described comprisin a bottom supportv for a mold body provided with a plurality of openings, rods constituting side supports for the mold body Vand adapted flor selective insertion through the openings in the bottom support whereby to permit lateral adjustment of the rods with respect to the bottom support to accommodate mold bodies oi' different widths, said rods being movable` vertically through said openings adjustment of said rods with respect to the bottom support to accommodate mold bodies of different heights, and each of said rods provided Vwith an opening for the reception orP a nail or screw to hold the same in fixed position with respect to the mold body.

ln testimony whereof, l affix my signature hereto.

CLIFFORD A. BARRQ to permit vertical 

